Simply stated, federalism is good news because we get innovation, diversity, and experimentation. States that make wise choices will be role models for their peers. And it’s also worth noting that states that screw up will provide valuable lessons as well.

But sometimes a real-world example is the most compelling evidence of all. And the news that Vermont has cancelled its proposed single-payer healthcare scheme (as predicted by Megan McArdle) shows us why federalism is such a good concept.

Let’s start by reviewing what’s happened. Here are some excerpts from a report published by the Daily Caller.

Vermont Gov. Peter Shumlin is canceling his dream plan to create a single-payer health system in the state, he announced Wednesday. …“In my judgment, now is not the right time to ask our legislature to take the step of passing a financing plan for Green Mountain Care.” The problem is, of course, how to pay for it. Even while plans were moving forward for a 2017 launch of the single-payer system, to be called Green Mountain Care, Shumlin had held off on releasing a plan for how to pay for the system, waiting until his announcement Wednesday.

Tax hikes required to pay for the system would include a 11.5 percent payroll tax as well as an additional income tax ranging all the way up to 9.5 percent. Shumlin admitted that in the current climate, such a precipitous hike would be disastrous for Vermont’s economy. …the report also admits that the single-payer system won’t save money as Vermont officials had planned. While both previous reports on Green Mountain Care had assumed “hundreds of millions of dollars” in savings in the very first year of operation, Shumlin’s office is now admitting that’s “not practical to achieve.” …Shumlin also cited slow economic recovery in Vermont as reason to delay, and hopes to try again in the future. But its failure, especially on economic grounds, is a resounding defeat for single-payer advocates.

Yes, this is a “resounding defeat” for socialized health care.

But it’s important to understand why Shumlin’s plan collapsed. He and other politicians obviously figured out (notwithstanding their claims when running for office) that a huge tax hike, combined with “free” healthcare, was a recipe for state disaster.

Productive people and businesses would have emigrated, while freeloaders and scroungers would have immigrated. The state would have gone into a downward spiral.

So even though Shumlin is a hard-core leftist, and even though Vermont’s electorate is so statist that the state came in first place in the Moocher Index, all these advocates of socialized healthcare were forced to recognize real-world constraints imposed by the existence of other states.

So the productive people of Vermont (at least the ones that haven’t already escaped) should be very thankful for federalism. Competition among the states, as well as freedom of movement between states, is a wonderful check on the greed and foolishness of the political class.

The crowd in Washington, by contrast, has more flexibility to impose bad policy since moving from one country to another is far bigger step than simply moving from, say, California to Texas.

The bottom line is that Vermont did face real-world competitive pressure. And that meant the state’s politicians didn’t think they could successfully raise enough money to finance socialist healthcare.

This reminds me of this famous Margaret Thatcher quote about other people’s money.

I’m disappointed that I couldn’t find a clip of her actually making that statement. But if you want to see the Iron Lady in action, you can click here or here.

John Carroll Jr., invented a whole category of corporate tax avoidance and successfully defended it in a fight with the Internal Revenue Service. …The first corporate “inversion,” as Carroll’s maneuver came to be known, was obscure then and is all but forgotten now. Yetat least 45 companieshave followed the lead of Carroll’s client…and shifted their legal addresses to low-tax foreign nations.…A committed liberal, he…once considered leaving the practice to work for antiwar candidate George McGovern’s 1972 presidential campaign. …McDermott’s chief financial officer at the time, says he sometimes puzzled over Carroll’s motivations. “It was always an enigma to me,” Lynott says. “We knew this guy was a Democrat, and yet he would take on the government in a New York minute over a tax issue. There was nothing liberal about his thinking as far as the tax code was concerned.” …The IRS fought the case for seven years, giving up in 1989 only after a federal appealscourt uphelda U.S Tax Court decision in the company’s favor.

The Center for Immigration Studies recently put out a study arguing that immigration has had negative effects on California. One of their measures was a comparison of how many people in the state were receiving some form of welfare compared to other states. I found that data (see Table 3 of the report) very interesting, but not because of the immigration debate (I’ll leave others to debate that topic). Instead, I wanted to get a better understanding of the variations in government dependency. Is there a greater willingness to sign up for income redistribution programs, all other things being equal, from one state to another? The “all other things being equal” caveat is very important, of course, since the comparison produced by CIS may simply be an indirect measure of the factors that determine welfare eligibility. One obvious (albeit crude) way of addressing this problem is to subtract each state’s poverty rate to get a measure of how many non-poor people are signed up for income-redistribution programs. Let’s call this the Moocher Index.

A few quick observations. Why is Vermont (by far) the state with the largest proportion of non-poor people signed up for welfare programs? I have no idea, but maybe this explains why they elect people like Bernie Sanders. But it’s not just Vermont. Four of the top five states on the Moocher Index are from the Northeast, as are six of the top nine. Mississippi also scores poorly, coming in second, but many other southern states do well. Indeed, if we reversed the ranking and did a Self-Reliance Index, Virginia, Florida, and Georgia would score in the top 10. Nevada, arguably the nation’s most libertarian state, is the state with the lowest number of non-poor people signed up for welfare.

Let’s now emphasize several caveats. I’m not an expert on the mechanics of social welfare programs, but even I know that eligibility is not governed solely by the poverty rate. Indeed, some welfare programs are open to people with much higher levels of income. This means that a more thorough analysis at the very least would have to include some measure of income distribution by state. Moreover, states use different formulas for Medicaid eligibility, so this index ideally also would be adjusted for state-specific policies that make it easier or harder for people to become dependent. There also are some states (and even colleges) that actually try to lure people into signing up for welfare, which also might affect the results. And I’m sure there are many other factors that are important, including perhaps immigration. If anybody knows of most substantive research in this area, please don’t hesitate to share material.